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SC667ULTRT Datasheet(PDF) 8 Page - Semtech Corporation

Part # SC667ULTRT
Description  7 LED Light Management Unit Automatic Dropout Prevention, Ambient Light Sense Input, PWM Dimming, and 4 LDOs
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Manufacturer  SEMTECH [Semtech Corporation]
Direct Link  http://www.semtech.com
Logo SEMTECH - Semtech Corporation

SC667ULTRT Datasheet(HTML) 8 Page - Semtech Corporation

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SC667
8
Typical Characteristics — Backlights (continued)
Group #1 Blink Function (25mA)
— 25mA
Time (400ms�div)
s�div)
�div)
I
BL (10mA/div)
Start time = 32ms, target time = 3072ms
0mA
Group #1 Breathe Function (20mA to 0.5mA)
— 20mA
Time (1000ms�div)
s�div)
�div)
I
BL (10mA/div)
Breathe rate = 24ms, start time = 32ms, target time = 1024ms
— 0.5mA
Bank #1 with ADP (rate = 256µs)
0mA
Time (10ms�div)
s�div)
�div)
I
BL (10mA/div)
V
IN (500mV/div)
Battery transient condition: 100Hz, 12.5% duty cycle
15mA
3.40V
3.05V
15mA
11mA
Backlight with ADP (rate = 4ms)
Time (20ms�div)
s�div)
�div)
I
BL (10mA/div)
V
IN (500mV/div)
Battery transient condition: 50Hz, 30% duty cycle
15mA
3.32V
2.98V
8mA
14
13
12
11
10
9
0mA —
Backlight Dimming with ALS and Fade
Time (1000ms�div)
s�div)
�div)
I
BL (10mA/div)
V
ADI (1V/div)
V
IN = 3.7V, VLDO4 = 2.8V, ADRISE = B0h, ADFALL = 80h, 4ms fade rate
10mA
0.5mA
0V —
0.5mA
2.8V —
ADC reference
brighter
dimmer
ambient
lighting


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